During the overnight hours from June 30th to July 1st, a series of slow moving thunderstorms moved across portions of Indiana causing isolated pockets of flash flooding. There were several reports of rainfall amounts over 3 inches with widespread areas of 2-3 inches.
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS IND wrote it up.
During the overnight hours from June 30th to July 1st, a series of slow moving thunderstorms moved across portions of Indiana causing isolated pockets of flash flooding. There were several reports of rainfall amounts over 3 inches with widespread areas of 2-3 inches. The most significant flash flooding occurred in far eastern Fountain County where State Road 32 was shut down for several weeks after a section of the road was washed out after a culvert overflowed.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Indianapolis, IN wrote its last area forecast discussion before the first event at Jul 1, 12:07 AM EST, 1 hour 8 minutes earlier.
Area Forecast Discussion National Weather Service Indianapolis IN 107 AM EDT Thu Jul 1 2021 .Mesoscale Update... Issued at 107 AM EDT Thu Jul 1 2021 ...HEAVY RAINFALL AND FLASH FLOODING CONCERNS THROUGH THE NIGHT... Focus for the next several hours will be on heavy rainfall and an increasing flash flood threat with a deep tropical airmass remaining over the region. PWATS continue to hover between 1.7 and 1.9 inches across the forecast area with the highest amounts focused across the southern half of the forecast area. As is often the case in these setups...the mesoscale parameters are driving the evolution of the activity. Within the hi-res guidance...a narrow ribbon of convergence noted within the 850mb level is starting to align near or perhaps just south of the I-70 corridor. This is likely to strengthen slightly over the next few hours and may eventually be the area where the heaviest rainfall sets up through the overnight. Convection already appears to be developing within that zone...with doppler radar estimating 2 inches in spots over Clay and Vigo Counties over the last 60 to 90 minutes. The flash flood risk is elevated overnight not just for the enhanced convergence zone mentioned above...but weak westerly 850mb flow which will support potential for backbuilding and training of cells. Freezing levels remain elevated as well which supports ongoing warm rain processes. All of this supports a highly efficient airmass for high rainfall rates. With trends shifting north over the last hour or two...will bring the flash flood watch north a row of counties up to Vigo County east through Rush County. May bring the watch even further north up into the Indy metro but there is still time to see specifically where the heaviest rainfall axis sets up. Potential exists through daybreak of up to 2-4 inches in some of the heaviest and most persistent convection. Zone and grids updated. && .Forecast Update... Issued at 934 PM EDT Wed Jun 30 2021 Surface analysis this evening shows a weak cold front in place across northern IL and southern Michigan. a polume of tropical moisture was streaming across the Great plains to Indiana and the Ohio Valley providing ample moisture to the area. Radar Trends across the area showan area of showers over Decatur county exiting east...while more showers were found upstream over Central Il within the moist flow aloft. Overnight the cold front to the north is expected to slowly sag southward toward central Indiana...interacting with the warm and moist air mass in place across the area. Ongoing showers and storms upstream are also expected to advect to central Indiana overnight as suggested by the HRRR. Thus have trended pops lower the next few hours as we have a brief lull in precipitation...however rampped pops back up rapidly overnight with teh expected arrival of showers upstream. Low in the lower 70s appear quite reasonable given the warm dew points in place across Central Indiana. Local Flash Flooding could become a concern overnight...particularly in southern Central Indiana where earlier heavier rains have been seen along with additional rain possible. && .Short Term...(This evening through Thursday night) Issued at 240 PM EDT Wed Jun 30 2021 Showers and thunderstorms will continue through the rest of the day into the overnight hours as a surface front continues to slowly sag to the south. The upper level jet remains across the area which is allowing for storm motions to be just fast enough to prevent any significant flooding issues even with PWATs up to near 2 inches in spots. The cool air in the mid levels is allowing for CAPE values to near 2000 J/kg even with little to no cloud cover which will continue through the night, although closer to 1000 J/kg. Currently expect that showers and storms will briefly become more widespread late this afternoon and this evening before lessening in coverage overnight with isolated thunder. Late tonight, an upper level shortwave will provide more widespread lift and allow for widespread light to moderate showers through the early morning hours before the front fully exits. Generally dry weather is then expected during the daytime hours, but with cooling temperatures aloft, can't rule out an isolated shower or storm mid to late afternoon during peak heating. Any showers that do initiate will dissipate around sunset with much cooler air advecting into the area going into the weekend as surface and upper level flow turns near northerly as a strong upper level moves into the Northeastern United States. && .Long Term...(Friday through Wednesday) Issued at 240 PM EDT Wed Jun 30 2021 The long term will start off with an upper trough pivoting off the eastern Great Lakes and northern Appalachians on Friday. Meanwhile, late in the weekend, a Canadian surface high will move into the Ohio Valley and an upper wave will move to the Great Lakes and Missouri Valley. The result will be a dry Fourth of July weekend with temperatures starting off below normal but then rebounding to normal or slightly above for Independence Day. The humidity and chances for thunderstorms will return by the middle of next week as the high moves to the east and warm, moist and unstable Gulf air returns on the back side of the high. && .Aviation...(06Z TAF Issuance) Issued at 1127 PM EDT Wed Jun 30 2021 IMPACTS: -Mainly IFR cigs are expected over the next 12 hours. Areal coverage of showers and isolated TSRA expected to increase after midnight. - MVFR cigs and vsbys in heavier showers. - MVFR Cigs will be possible in the wake of the cold front after 011800Z DISCUSSION: Expect radar coverage of SHRA and TSRA to increase across the area overnight as cold front slowly sags southward into a warm and moist air mass in place across Central Indiana. Ongoing showers and storms upstream are expected to move across the TAf sites overnight as suggested by the HRRR. In the wake of the front on Thursday morning...MVFR Cigs will be expected with diminishing chances for precipitation. Forecast soundings hint toward drying out with subsidence in the wake of the front. Thus a return to VFR Cigs will be expected near 02000. && .IND WATCHES/WARNINGS/ADVISORIES... Flash Flood Watch until 8 AM EDT this morning for INZ051>057- 060>065-067>072. && Mesoscale...Ryan Update...Puma Short Term...White Long Term...Koch Aviation...Puma
Hazardous Weather Outlook National Weather Service Indianapolis IN 952 PM EDT Wed Jun 30 2021 INZ021-028>031-035>049-051>057-020200- Carroll-Warren-Tippecanoe-Clinton-Howard-Fountain-Montgomery-Boone- Tipton-Hamilton-Madison-Delaware-Randolph-Vermillion-Parke-Putnam- Hendricks-Marion-Hancock-Henry-Vigo-Clay-Owen-Morgan-Johnson-Shelby- Rush- Including the cities of Delphi, Flora, Williamsport, West Lebanon, Lafayette, West Lafayette, Frankfort, Kokomo, Attica, Covington, Veedersburg, Crawfordsville, Lebanon, Zionsville, Tipton, Fishers, Carmel, Noblesville, Anderson, Muncie, Winchester, Clinton, Newport, Rockville, Greencastle, Plainfield, Brownsburg, Danville, Indianapolis, Greenfield, New Castle, Terre Haute, Brazil, Clay City, Spencer, Martinsville, Mooresville, Greenwood, Franklin, Shelbyville, and Rushville 952 PM EDT Wed Jun 30 2021 This hazardous weather outlook is for central Indiana. .DAY ONE...Tonight. Scattered showers and thunderstorms will continue through the overnight. Isolated flooding and damaging winds will be the primary threats with lightning a danger in any thunderstorm. Storm motion will be from the west at 10 to 20 mph. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. Showers and thunderstorms will continue on Thursday with dry weather expected Friday through the holiday weekend. Storms will be capable of producing heavy rainfall. .SPOTTER INFORMATION STATEMENT... Spotter activation is not anticipated. && More information, along with other weather, hydrological and climate information can be found at http://weather.gov/ind INZ060>065-067>072-020200- Sullivan-Greene-Monroe-Brown-Bartholomew-Decatur-Knox-Daviess-Martin- Lawrence-Jackson-Jennings- Including the cities of Sullivan, Linton, Bloomfield, Bloomington, Nashville, Columbus, Greensburg, Vincennes, Washington, Loogootee, Shoals, Bedford, Mitchell, Seymour, Brownstown, and North Vernon 952 PM EDT Wed Jun 30 2021 This hazardous weather outlook is for central Indiana. .DAY ONE...Tonight. A FLASH FLOOD WATCH is in effect until 800 AM. Heavy Rain is possible overnight. This combined with already saturated grounds due to earlier rain could result in Flash Flooding. Scattered showers and thunderstorms will continue through the overnight. Isolated flooding and damaging winds will be the primary threats with lightning a danger in any thunderstorm. Storm motion will be from the west at 10 to 20 mph. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. Showers and thunderstorms will continue on Thursday with dry weather expected Friday through the holiday weekend. Storms will be capable of producing heavy rainfall. .SPOTTER INFORMATION STATEMENT... Spotter activation is not anticipated. && More information, along with other weather, hydrological and climate information can be found at http://weather.gov/ind Puma
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
816 PM EDT WED JUN 30 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0758 PM HEAVY RAIN WOODVIEW HILLS 39.15N 86.39W
06/30/2021 M3.55 INCH MONROE IN AMATEUR RADIO
THIS AMOUNT FELL IN 1 HOUR. THREE INCHES OF
STANDING WATER IS ON SR46 BETWEEN NORTH
BRUMETTS CREEK ROAD AND NORTH SEWELL ROAD.
&&
BHPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
909 PM EDT WED JUN 30 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0815 PM HEAVY RAIN 2 E WOODVIEW HILLS 39.15N 86.34W
06/30/2021 M1.98 INCH BROWN IN TRAINED SPOTTER
BETWEEN 1915 AND 2015 EDT 1.74 INCHES OF
THIS RAIN FELL. THE REMAINDER FELL
BEFOREHAND.
&&
BHPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
1242 AM EDT THU JUL 1 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1230 AM FLASH FLOOD 4 S INDIANA STATE UNIVE 39.42N 87.40W
07/01/2021 VIGO IN PUBLIC
REPORT FROM MPING: RIVER/CREEK OVERFLOWING;
CROPLAND/YARD/BASEMENT FLOODING.
&&The Indianapolis radar (KIND), 105 km away, was scanning. The volume nearest the first event began at 06:12 UTC.
5 flash flood. Local standard time, as filed.
Several roads across Terre Haute were closed either due to standing water or water flowing over the road. There was a report of water several inches deep in a house, but no details on the location.
A 100 foot stretch of Oliver road was flooded near the Harding Street exit of Interstate 70. Additional roads were closed due to water flowing over them across the downtown area.
Heavy rains washed out a section of State Road 32 in far eastern Fountain county along the border with Montgomery county.
Flooding of low-lying roads all over the county. Several roads were closed through the overnight hours.
Water was noted to be flowing over several city roads in Frankfort with other reports of rural roads with deep standing water.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Indiana in 2021Every state in 2021This day in weather historyWarnings in Indiana, July 2021
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 968816, 968818, 968819, 968821, 968825.